Kings of Leon have reportedly fallen out with each other on the verge of their world tour, which begins in Brighton on Monday (December 1st).

Tabloid reports claim that tension is centred on frontman Caleb Followill's excessive drinking.

Followill's fellow band mates – and fellow family members – Nathan, Jared and Matthew are said to have exchanged “blows” with the singer.

“The others have warned Caleb over and over again that they weren’t happy about his drinking but he carried on regardless,” a source told the Sun newspaper.

“The lads have always fought but they usually sort it out the next morning. Things are completely different this time.

“The label is deeply concerned that if they don’t sort out their differences the tour won’t go ahead.”

Kings of Leon's popularity has escalated since their headlining performance at the Glastonbury festival in June. Their latest LP, 'Only By The Night', is the second fasted record of 2008.

(by Jason Gregory)